Psychophysical Theory

Improvement of contrast sensitivity with practice is not compatible with a sensory threshold account. J Opt Soc Amer 34:870-880 (with JA Solomon). 2017. PDF

Shading beats binocular disparity in depth from luminance gradients: evidence against a maximum likelihood principle for cue combination. PLoS One. 10(8):e0132658. 2015. (with CC Chen). PDF

Weight allocation in summary statistics. Perception 44, 248-249. 2015 (with J. Solomon).

The vault of perception: Are straight lines seen as curved? Art & Perception 3 (1), 117-137. 2015. PDF

Perceptual coding for 3D reconstruction. EUVIP 2011 10.1109/EuVIP.2011.604553, 2011. (with S.C. Nicholas). PDF

Paradoxical perception of surfaces in the Shepard tabletop illusion. i-Perception 2:137–141, 2011. PDF

The role of midlevel surface representation in 3D object encoding. In Computer Vision: From Surfaces to 3D Objects. Tyler C.W., (Ed) Chapman Hall: New York, p vii-xxiii, 2011.

Visual surface encoding: A neuroanalytic approach. In Computer Vision: From Surfaces to 3D Objects. Tyler C.W. (Ed) Chapman Hall: New York, p 163-182, 2011. (with L.T. Likova)

Crowding: A neuro-analytic approach. J Vision 7, 1-9, 2007. (with LT Likova). PDF

Theory of texture discrimination based on higher-order perturbation in individual texture samples. Vision Res. 44:2179-2186, 2004. PDF

Analysis of the Mechanisms of Human Visual Processing. (D.Sc. Dissertation, University of Keele, 2004). PDF

What makes Mona Lisa smile? Vision Res. 44:1493-8, 2004. (A classification-image approach to the manipulation of facial expression, with LL Kontsevich). PDF

The unique criterion constraint: a false alarm? Nat Neurosci. 5:707, 2002; author reply 707-8. ( with LL Kontsevich, CC Chen & P Verghese). PDF

Separating the effects of response nonlinearities and internal noise psychophysically. Vision Res. 42:1771-1784, 2002. (with LL Kontsevich). PDF

Lateral sensitivity modulation explains the flanker effect in contrast discrimination. Proc Biol Sci. 268:509-16, 2001. (with CC Chen). PDF

Occlusions contribute to scaling in natural images. Vision Res. 41:955-64, 2001. (with R Balboa and NM Grzywacz). PDF

The symmetry magnification function varies with detection task. J Vision 1:137-44, 2001. PDF

Signal detection theory in the 2AFC paradigm: attention, channel uncertainty and probability summation. Vision Res. 2000 40:3121-44. (with CC Chen). PDF

Accurate approximation to the extreme order statistics of Gaussian samples. Communications in Statistics-Simulation and Computation 28 (1), 177-188, 1999. (with CC Chen). PDF

Bayesian adaptive estimation of psychometric slope and threshold. Vision Res. 39:2729-37, 1999. (with LL Kontsevich). PDF

Demonstrating the temporal modulation transfer function. Perception. 28:623-6, 1999. (with SM Anstis & LL Kontsevich). PDF

Distraction of attention and the slope of the psychometric function. J Opt Soc Am A Opt Image Sci Vis. 16:217-22,1999. (with LL Kontsevich). PDF

Nonlinearities of near-threshold contrast transduction. Vision Res. 39:1869-80, 1999. (with LL Kontsevich). PDF

How much of the visual object is used in estimating its position? Vision Res. 38:3025-9, 1998. (with LL Kontsevich). PDF

Analysis of human receptor density. In V. Lakshminarayanan (ed), Basic and Clinical Applications of Vision Science: the Professor Jay M. Enoch Festschrift Volume, Ch 6, 1997.

Diffuse illumination as a default assumption for shape-from-shading in the absence of shadows. J. Inf. Sci. Tech. 42:319-325, 1997. PDF

Why we need to pay attention to psychometric function slopes. Visual Science and Its Applications. Optical Society of America Topical Meeting 240-244, 1997. PDF

Multiple mechanisms for the detection of mirror symmetry. Spatial Vision 9:79-100, 1995. (with L Hardage, RT Miller). PDF

Theoretical issues in symmetry perception. Spatial Vision 8:383-391, 1994. PDF

Theoretical Psychophysics? Guest Editorial. Perception, 6:1-3, 1996. PDF

Bit-Stealing: How to get 1786 or more grey levels from an 8-bit color monitor. Proceedings SPIE. 1666:152-155, 1992 (with H Chan, L Liu, B McBride). PDF

Some tacit assumptions in visual psychophysics. In A. Gorea (ed.) Representations of Vision: Trends and Tacit Assumptions in Vision Research, Cambridge, UK: Cambridge University Press, 1991. PDF

Two processes controlling life span variations in flicker sensitivity. J. Opt. Soc. Am. A6, 481-490, 1989.

Invariance of the slope of the psychometric function with spatial summation. J. Opt. Soc. Am. A3:1166-1177, 1986 (with MJ Mayer).